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From ionic liquid-modified cellulose nanowhiskers to highly active metal-free nanostructured carbon catalysts for the hydrazine oxidation reaction
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SYSNO ASEP 0470621 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název From ionic liquid-modified cellulose nanowhiskers to highly active metal-free nanostructured carbon catalysts for the hydrazine oxidation reaction Tvůrce(i) Fragal, E.H. (BR)
Fragal, V.H. (BR)
Huang, X. (US)
Martins, A.C. (BR)
Cellet, T.S.P. (BR)
Pereira, G.M. (BR)
Mikmeková, Eliška (UPT-D) RID
Rubira, A.F. (BR)
Silva, R. (BR)
Asefa, T. (US)Celkový počet autorů 10 Zdroj.dok. Journal of Materials Chemistry A. - : Royal Society of Chemistry - ISSN 2050-7488
Roč. 5, č. 3 (2017), s. 1066-1077Poč.str. 12 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova carbonization ; catalysts Vědní obor RIV JA - Elektronika a optoelektronika, elektrotechnika Obor OECD Physical chemistry Institucionální podpora UPT-D - RVO:68081731 UT WOS 000394430800026 EID SCOPUS 85010304215& DOI 10.1039/c6ta09821e Anotace Ionic liquid (or [C4mim][CH3SO3])-modified cellulose nanowhiskers (CNWs) are synthesized and successfully used as precursors to make heteroatom (N and S)-doped nanostructured carbon catalysts. The catalysts can efficiently electrocatalyze the hydrazine oxidation reaction (HOR) with an onset potential close to the reaction's thermodynamic value, or with a value better than those obtained for other related materials. The synthesis of these metal-free carbon electrocatalysts generally involves only a few, relatively less demanding synthetic steps. Based on relevant control experiments, the outstanding catalytic activity of the materials is attributed to the heteroatom dopants and defect sites in the materials, which form during carbonization due to the [C4mim][CH3SO3] placed around the CNWs. However, it is not necessarily the density of heteroatom dopant species introduced into the nanostructured carbon materials by the ILs that directly affect the electrocatalytic activity of these materials; it is rather the specific type of dopant-associated chemical moiety and vacancy site created in the materials, which are the main factors positively affecting the electrocatalytic activity of the materials toward the reaction. The surface areas of the materials play a relatively lesser role in affecting the electrocatalytic properties of the materials toward the HOR as well. Pracoviště Ústav přístrojové techniky Kontakt Martina Šillerová, sillerova@ISIBrno.Cz, Tel.: 541 514 178 Rok sběru 2017
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